Finding the Third Proportional to 311,818.50 and 502,155

Step by Step Solution

1. Step 1: Write the proportion equation
   311,818.50 : 502,155 = 502,155 : x
2. Step 2: Convert to fraction form
   311,818.50/502,155 = 502,155/x
3. Step 3: Cross multiply
   311,818.50x = 502,155 × 502,155
4. Step 4: Simplify right side
   311,818.50x = 252,159,644,025
5. Step 5: Solve for x
   x = 252,159,644,025/311,818.50
6. Step 6: Final answer
   x = 808,674.42